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Finding the Fourth Proportional to 64,280.40, 96,427.80 and 19,906.80

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Solution

The fourth proportional to 64,280.40, 96,427.80 and 19,906.80 is: 29,862.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,280.40 : 96,427.80 = 19,906.80 : x
  2. Step 2: Convert to fraction form
    64,280.40/96,427.80 = 19,906.80/x
  3. Step 3: Cross multiply
    64,280.40x = 96,427.80 × 19,906.80
  4. Step 4: Simplify right side
    64,280.40x = 1,919,568,929.04
  5. Step 5: Solve for x
    x = 1,919,568,929.04/64,280.40
  6. Step 6: Final answer
    x = 29,862.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.